Tool-holber



. 1. B. E. H. 061E.

TOOL HOLDER. APPLICATION FILED FEB. 1, 191a.

Patented Dec. 30,1919.

2 SHEETS-SHEET I J.B.E.'H.06IE.

'TOOL HOLDER. APPLICATION FILED FEB. I, I9I8.

lfigfififig Patented Dec. 30,1919.

2 SHEETS-SHEET 2. 1

' d B.E.1Y. 562?.

mm B. n. :1. corn, or WEYMOUTI-I, MASSACHUSETTS.

TOOL-HOLDER.

p a o of er B e t- Patented Dec. 30, 1919.

Application filed February 1, 1918. Serial No. 214,929.

To all whom it may concern:

Be it known that I, JEAN. B. E. H. com, a citizen of United States, residing at Weymouth, in the county of Norfolk and State of Massachusetts, have invented certain new and useful'lmprovements in Tool- I Holders; and I "do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to a tool holder More specifically,'this invention comprehends a tool holder including a head provided with a recess in which is pivotally mounted a pair of spring controlled tool holding sockets, which adjustably and reinovably support the metal cutting tools which tools are arranged in opposed relation to each other, one of them being longerthan the other, while the short tool has its cutting edge placed substantially one eighth of an inch ahead of the cutting edge of the long tool so as to place a first cut onthe metal while the long tool will take a second or following cut in the path of the out of the short tool, upon the reverse stroke of the planer plates.

With the foregoing and other objects in view this invention consists in such n6ve1 features of construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying drawings and claimed.

In describing the invention in detail, reference will be had to the accompanying drawings wherein like charactersdesignate like and corresponding parts throughout the several views and in which:

Figure 1 is a perspective view of the improved tool holder.

Fig. 2 is a side elevation of the tool holder having the inclosing sides or plates removed to expose the interior of the head.

Fig. 3 is a section through the: head.

Fig. 4 is a transverse section through the head taken on the line 1 l of Fig. 2.

Fig. 5 is a section on. the line 5T5 of Fig. 2.

Fig. 6 is a detailperspective View of one of the pivoted tool holding sockets.

Fig. 7 is a fragmentary, enlargedsection through a part of one of the tool holding sockets illustrating the manner of connecting the springs thereto and F ig. 8 is a detail view of the wrench used for loosening the tools in -the sockets.

Referring more particularly to the drawings, 1 designates the main body of the tool head, which includes a rectangular too-l carrying portion 2 having a shank 3 formed thereon which is adapted to be seated in the chuck or tool carrying element of a planer, shaper or analogous machine.

The rectangular head 2 is provided with a recess t formedtherein which communicates with its outer end or edge and one side thereof, as shown in Fig. 2 of the drawings.

Said recess 4: is divided substantially equidistance from its ends a by a substantially triangular shaped extension 5 which projects inwardly from the inner wall ofthe recess, and has its apex positioned at the transverse center and substantially at the-longitudinal center of the recess so that the sides of the extension will form stops for limiting the inward pivotal movement of the tool carrying sockets 6 and 7 Thetool carrying sockets 6 and 7 are pivotally mounted within the recess 4, upon bolts 9 which extend through the tool socket members 6 and '7 and have their inner ends threaded into the head 2 as shown at 10 in Fig. 5 of the drawings. The inner wall of the recess 4:, outwardly from the sides of the extension 5 is curved, as shown at 11 to provide a bearing for the inner end of the tool carrying members or elements 6 and 7. The sides of the members 6 and 7 slightly diverge from their curved ends 12 and the outer ends of these members are beveled as shown at 13, outwardly of the tool receiving sockets 14 thereof. The sockets 1 receive ordinary metal cutting tools 15 and 16 respectively which have their cutting edges shaped to properly engage or cut cast iron or similar metal such as is worked upon a planer, shaper or the like. The tool tools 15 and 16 for holding these tools The tool carrying elements 6 and 7 are provided with recesses 20 and21 respectively, formed in their facing sides in which recesses the ends of the spiral springs 22 extend. The spring 22 yieldably holds the tool carrying elements 6 and 7 in spread position and with their outer sides in engagement with the end walls of the recess at against which the outer edges of the tool carrying elements abut when the tool carried thereby is cutting and it further permits the tool which is running idle to pass freely over the casting or metal being worked.

A plate 24: is attached to the side of the head 2 into which the recess opens, and this plate forms a closure for the recess. The plate 24 is attached to the head 2 by suitable bolts 25 so that it may be readily removed if desired. The plate 2a is provided with a plurality of openings 26 which aline with the openings 27 formed in the set screws 18, so that the wrench 19 may be inserted through the openings 26 and into the openings of the set screws 18 for tightening or loosening the set screws to permit the removal of the tools 15 and 16.

A relatively thin plate 27 is mounted over the end of the head 2 and forms a closure for the greater portion of the recess 4 which opens into the end of the head 2. The plate 27 is provided with a rectangularslot 28 formed centrally therein through which the tools 15 and 16 pass during the pivotal movement of the tool carrying elements 6 and 7.

In the operation of the improved tool carrying head, or tool holder, the cutting tool 15 is shorter than the cutting 16 and it has its cutting edge positioned substantially one eighth of an inch ahead of the cutting edge of the tool 16 and in starting a out upon a piece of work, the tool 16 is placed nearest the rail of the planer so that it will take the first cut during the forward or out ward stroke of the platen of the planer.

Upon the return stroke of the planer platen,

the tool 16 will ride over the work, owing to the pivotal connection of element 17 which carries the tool and the tool 15 will take the tool holder, it will be possible to cut sub-' stantially twice the amount of metal from a casting upon one complete movement of the tool head across the work being cut and resulting in a consequent saving of time and power.

Having thus fully described the invention what is claimed is:

An apparatus of the character set forth including a head having a recess provided with inwardly tapered end walls and a rear wall provided with a pair of rounded surfaces, work holding elementspivoted within said recesses and having theirrear end portions rounded and abutting the rounded surfaces of the rear wall of the recess, a tapered shoulder disposed between said work holding elements for limiting the inward pivotal movement of the same, the outer longitudinal sides of said work holding elements being tapered and adapted to squarely abut the adjacent tapered end walls of the recess, and spring means normally retaining the work holding elements in en'- gagement with the adjacent end walls of, the

WILLIAM D. AITKEN, Jr. r 

